Answer:
No. They don't necessarily have to be the same. For example, there can be isotopes (different numbers of neutrons) or ions (different numbers of electrons). The only thing that can't vary between atoms of the same element is the number of protons, but the others can have some variation.
Answer:
(a) negative feedback.
Explanation:
A negative feedback mechanism operates in the direction of maintaining the homeostasis. Any change from the defined range of internal conditions of the body is sensed as a stimulus. It triggers a response that restores the original range of the internal condition. This is called a negative feedback mechanism. For example, when the body temperature rises, the blood vessels present near the skin surface dilate to lose more heat to the environment. This is one of the negative feedback produced against raised body temperature.
Organ system? Because that’s where all your digestive system works at
Answer:
plasma membrane, simple cells, a dna strand, ribosomes, a cell wall, cytoplasm, etc.